Files
gerbeur/api/services/email-service.ts
khannurien a36a4cac6b v3: fix the backend's correctness findings — each by a rule shared across the code rather than one more special case. Link previews: readTextCapped decoded every page as UTF-8, so a Latin-1 page came out garbled unless it went through the curl fallback, which re-encoded it on its own; pages are now decoded in the charset their Content-Type or <meta> declares, and the curl fallback hands the bytes over as they are. The image proxy served and cached for a day an error answer that claimed an image type, and read a body without Content-Length whole before checking its size; it now refuses an error status and reads through the same capped reader. The icons task's Twemoji fetch gives up after 15 s instead of holding the start up, and extractLinkHref, which only its tests used, is gone. Backlinks matched a linked URL against the raw url column, so https://x.com/ missed a dump posted as https://x.com; they now compare canonical URLs, as reposts do. The four LIKE searches put the query in raw, so % and _ were wildcards and the mention search for "a_b" found "axb"; lib/like.ts escapes them. Every list query now treats a malformed row the same way, a 500 through model/rows.ts's parseRows, where ten of them silently dropped it; the playlist dumps query uses the model's column list rather than a hand-written copy, and the aliased list is derived from the plain one. The vote and like services commit through transaction() instead of their own BEGIN and ROLLBACK, which would have rolled back a caller's transaction.
Validation: the dump validators refuse the nulls their shared types don't allow (a null title or note on creation, a null URL on edit); a playlist title of spaces is refused and titles are stored trimmed; usernames and emails are checked by the same USERNAME_RE and EMAIL_RE in shared/validation.ts on sign-up, on PATCH /api/users/me (which checked other limits) and in the sign-up form. Mentions are read by shared/mention.ts's mentionedUsernames, which skips code and URLs as Markdown shows them: https://mastodon.social/@bob or a `@bob` in code notified bob; the editor's suggestions derive their trigger from the same pattern instead of a copy. Following an unknown user is a 404 rather than a foreign-key 500, and following a private playlist a 404 rather than a 403 that confirmed it exists. `ws` and `emojibase` are reserved category slugs, since the server answers them before the app. GET /api/users/me no longer turns every error into a 500.

Dead code goes: adminOnlyMiddleware, verifyEmailTransport, listUsers, deleteUser with disconnectUser and the force_logout message only it sent, PATCH /api/notifications/:id/read (with markOneRead), isSlugAvailable, the unreachable 500 in fetchComment, and the `if (!ctx.state.user)` checks behind authMiddleware. 214 backend and 627 frontend tests pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-29 19:35:53 +00:00

122 lines
3.2 KiB
TypeScript

/**
* Sends mail through the SMTP server of {@link SMTPS_URL}, which may be unset.
* Its two callers, the welcome email at sign-up and the password reset link,
* check {@link isEmailEnabled} first and don't wait for delivery.
*
* @module
*/
import nodemailer, { type SendMailOptions, type Transporter } from "nodemailer";
import { SMTPS_URL } from "../config.ts";
/**
* One address, a comma-separated list of them, or an array, as nodemailer
* takes them.
*/
export type EmailRecipient = string | string[];
/**
* Passed to {@link sendEmail}. It needs a recipient, a subject, and a text or
* HTML body; the callers send the same Markdown as both, rendered for `html`.
*/
export interface EmailMessage {
from: string;
to: EmailRecipient;
subject: string;
text?: string;
html?: string;
cc?: EmailRecipient;
bcc?: EmailRecipient;
replyTo?: string;
}
/**
* Returned by {@link sendEmail} once the SMTP server has taken the message.
* No caller reads it yet.
*/
export interface EmailSendResult {
messageId: string;
accepted: string[];
rejected: string[];
}
let transporter: Transporter | null = null;
/**
* Checks whether an SMTP server is configured. Without one, sign-up sends no
* welcome email and a password reset request does nothing.
*/
export function isEmailEnabled(): boolean {
return SMTPS_URL.length > 0;
}
/** Flattens the recipient forms nodemailer takes and returns into addresses. */
function normalizeRecipients(
recipient: string | readonly (string | { address?: string })[] | undefined,
): string[] {
if (!recipient) return [];
if (typeof recipient === "string") {
return recipient.split(",").map((s) => s.trim()).filter(Boolean);
}
return recipient.flatMap((entry) =>
typeof entry === "string" ? entry.trim() : (entry.address?.trim() ?? "")
).filter(Boolean);
}
function getTransporter(): Transporter {
if (!isEmailEnabled()) {
throw new Error(
"GERBEUR_SMTPS_URL environment variable is required to send emails.",
);
}
if (!transporter) {
transporter = nodemailer.createTransport(SMTPS_URL);
}
return transporter;
}
/**
* Sends `message` and resolves once the SMTP server has accepted it. The
* transport is created on the first send.
*
* @throws {Error} When email is disabled, the message lacks a recipient,
* subject or body, or the server refuses it.
*/
export async function sendEmail(
message: EmailMessage,
): Promise<EmailSendResult> {
if (normalizeRecipients(message.to).length === 0) {
throw new Error("Email recipient is required.");
}
if (!message.subject.trim()) {
throw new Error("Email subject is required.");
}
if (!message.text?.trim() && !message.html?.trim()) {
throw new Error("Email body is required (text and/or html).");
}
const options: SendMailOptions = {
from: message.from,
to: message.to,
cc: message.cc,
bcc: message.bcc,
subject: message.subject,
text: message.text,
html: message.html,
replyTo: message.replyTo,
};
const info = await getTransporter().sendMail(options);
return {
messageId: info.messageId,
accepted: normalizeRecipients(info.accepted),
rejected: normalizeRecipients(info.rejected),
};
}